Miscarriages...

Amanda • 27 ttc for #1
Can miscarriages be genetic? I haven't had one. I'm 27, been ttc for 4 months. No luck. My sister had 3 miscarriages before she had my oldest nephew. I never had any pregnancy scares and I don't have kids. My pap smears have been normal. Can I still get checked to make sure I am fertile or do I have to wait till it's been a year? My bf has 2 kids so I know he can give babies but why can't I? I take vitamins which this month I'll change to a prenatal/fertility one. I haven't used opk's or temping yet. Maybe I'm doing something wrong. I have cysts too but idk what kind bc i haven't had money to go back for treatment yet. I'm at CD 2